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Process for production of isocyanate, isocyanate produced by the process, and use of the isocyanate

一种异氰酸酯、制造方法的技术，应用在链状脂肪族或环状脂肪族异氰酸酯领域，能够解决物性不良影响、收率降低等问题，达到提高流动性和移液性、提高生产率、良好移液性的效果

Active Publication Date: 2008-06-18
MITSUI CHEM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Byproduct chlorine derivatives are usually 3 to 10%, and sometimes nearly 20%, resulting in a decrease in yield. At the same time, it may also adversely affect the physical properties of resins such as urethane used. Therefore, it is usually not used. direct method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0092] An autoclave (reactor) with a pressure regulator equipped with a reflux condenser, a stirring blade, a thermometer, a hydrogen chloride gas blowing pipe, a carbonyl chloride blowing pipe, a raw material tank, and a raw material charging pump is used. In the reactor, the value of the diameter (D1) / inner diameter (D2) of the reaction vessel was 0.7, the value of the diameter (D) / length (L) of the groove was 0.59, and the inner volume of the reaction vessel was 2L. 846 g of ortho-dichlorobenzene was charged into the reactor as a reaction solvent, and 136.2 g (1.0 mol) of m-xylylenediamine and 621 g of ortho-dichlorobenzene (total amine concentration: 8.5% by weight) were charged into the raw material tank. Then, after raising the temperature in the reactor to 120° C., the internal pressure was adjusted to a high pressure of 0.01 MPa higher than the atmospheric pressure. Next, start charging hydrogen chloride gas into the reactor at a speed of 43.8 g / hr through the hydrogen...

Embodiment 2

[0095] The same reactor as in Example 1 was used. 846 g of ortho-dichlorobenzene was charged into the reactor as a reaction solvent, and 136.2 g (1.0 mol) of m-xylylenediamine and 621 g of ortho-dichlorobenzene (total amine concentration: 8.5% by weight) were charged into the raw material tank. Then, after raising the temperature in the reactor to 120° C., the internal pressure was adjusted to a high pressure of 0.05 MPa higher than the atmospheric pressure. Next, start charging hydrogen chloride gas into the reactor at a speed of 43.8 g / hr through the hydrogen chloride gas blowing pipe, and at the same time, start charging the space diluted with solvent from the raw material tank with a speed of 379 g / hr with the raw material charging pump. Xylylenediamine, charged in full amount in 2 hours. Furthermore, aging was performed for 1 hour while charging hydrogen chloride gas at 20 g / hr. After the reaction was finished, the conversion rate of the raw material amine was obtained ...

Embodiment 3

[0098]The same reactor as in Example 1 was used. 846 g of the reaction solvent o-dichlorobenzene was charged into the reactor, and 136.2 g (1.0 mol) of m-xylylenediamine and 621 g of o-dichlorobenzene (total amine concentration: 8.5% by weight) were charged into the raw material tank. Then, after raising the temperature in the reactor to 120° C., the internal pressure was adjusted to a high pressure of 0.1 MPa higher than the atmospheric pressure. Next, start charging hydrogen chloride gas at a rate of 43.8 g / hr through the hydrogen chloride gas blowing pipe, and at the same time, start charging m-phthalylene from the raw material tank at a rate of 379 g / hr from the raw material tank Base diamine, with 2 hours to fill the whole amount. Furthermore, aging was performed for 1 hour while charging hydrogen chloride gas at 20 g / hr. After the reaction was finished, the conversion rate of the raw material amine was obtained by the neutralization titration method, and the conversion...

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PUM

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Abstract

The present invention provides a method for producing isocyanate, which is preferably used in the field of optical materials and is widely used as a raw material for polyurethane-based materials and polyisocyanurate-based materials, including a process capable of improving the productivity of hydrochloride . The manufacturing method of chain aliphatic isocyanate or cycloaliphatic isocyanate of the present invention comprises making chain aliphatic amine or cycloaliphatic amine and hydrogen chloride reaction, obtains chain aliphatic amine hydrochloride or cycloaliphatic amine A method for producing a chain aliphatic or cyclic aliphatic isocyanate according to a hydrochloride step, wherein the step is carried out at a pressure higher than atmospheric pressure by 0.01 MPa or more.

Description

technical field [0001] The present invention relates to a method for producing chain aliphatic or cyclic aliphatic isocyanate including a step of reacting a chain aliphatic or cyclic aliphatic amine with hydrogen chloride (salt formation step). The present invention also relates to the chain aliphatic or cycloaliphatic isocyanate obtained by the above production method and its use. Background technique [0002] Isocyanate compounds are useful as raw materials for polyurethane-based materials, polyurea-based materials, polyisocyanurate-based materials, and the like used in the fields of chemical industry, resin industry, paint industry, and the like. [0003] In particular, plastic lenses using polyurethane-based materials containing sulfur atoms, etc., are lighter in weight, harder to break, and can be dyed than inorganic lenses, so they have rapidly become popular in optical elements such as spectacle lenses and camera lenses in recent years. [0004] Regarding the product...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C263/10C07C209/00C07C211/18C07C211/27C07C211/39C07C211/62C07C211/63C07C265/14C08G18/70
CPCC08G18/7642C08G18/757C08G18/72C07C263/10C07C265/14
Inventor 岛川千年森尻博之林秀俊深津典彦小林诚一汤本誉石山淳一土山慎也
Owner MITSUI CHEM INC
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